Qingdao
China
Shandong University of Science and Technology
Prefabricated fractured sandstone, Increasing amplitude cycle, Wing crack, Anti-wing crack, AF/RA, Fatigue damage mechanism
Hydraulic flushing, Flushing blank zones, Coal rock resistivity, Visualization detection technology
Ordos Basin, Huangling Mining Area, Oil-type gas, Emission law, Influencing factors